AMCEBA 



13 



which it shows is into cell-body and nucleus. The cell-body 

 forms by far the greater part of the organism, and the 



E. 



D. 



FIG. 2. Amoeba. 



A, B. The same individual in two phases of active movement, showing change of form. 



C. Another specimen, of a different species. Note the numerous short projections at 



the hinder end due to contraction, while at ect. the commencement of a new pseudo- 

 podium is indicated by a thickening of the ectoplasm. 



D. A specimen with two nuclei. 



E. Diagram of reproduction by simple fission. 



c.v. Contractile vacuole ; ect. ectoplasm or ectosarc; end. endoplasm or endosarc ; f.p. 

 food particles; f.v. food vacuole; nu. nucleus; psd. pseudopodium. (The arrows 

 show the general direction in which the animal is moving.) 



protoplasm of which it is composed is often distinguished as 

 cytoplasm. 



